Skip to content
BRACEBRACE by 30P · iPhone + iPad

A bass player in your pocket.

BRACE writes the bass part, not just the sound. Pick a genre, pick a part, and it plays: in key, in time, around the kick.

  • Free to download
  • One-time unlock
  • No subscription
  • No account
The BRACE PLAY screen on iPhone: a Drum and Bass line in B natural minor at 174 BPM, with the DILATE pad beside it and SPARK, CREATE, GENRES and EDIT along the bottom.
The real PLAY screen. The line on the left is the part BRACE wrote; DILATE on the right bends it with one finger.

What it is

A player inside the instrument.

Most bass apps give you sounds. BRACE gives you a bassist. It knows what a part is for — holding the root, rolling under a break, sitting between the kicks — and it plays that job. You stay the author.

  1. GenreWhat are you making?
  2. PartWhat should the bass do?
  3. PlayIt plays. Now push it.

Ten genres

Start from what you're making.

Each genre sets its own tempo, key, voice and the way its bass behaves. These are BRACE's own descriptions.

90

Hip Hop

Under the kick, space, a root and one move.

92

Rap

Low, steady, leaves room for the voice.

140

Trap

Long 808s that slide between roots.

140

Dubstep

Sub on one, then a growl that talks.

174

Drum & Bass

Rolling sub under a Reese.

124

Rock

Picked eighths on the root, octave jumps.

150

Metal

Locked to the kick, low and tight.

100

Heavy Alt

Fuzz under the guitars, long low notes.

122

Electronica

Sequenced saws, arps, pulse.

110

Experimental

Metal, FM, SPARK territory.

Four parts in every genre

Give the bass a job.

In Drum & Bass that's Rolling Sub, Hold, Stab or Pocket. One rolls under the break, one holds a long note a bar — it supports, it doesn't perform. Each genre has its own four.

The BRACE part picker for Drum and Bass: Rolling Sub, Hold, Stab and Pocket, each with a preview of its line.

Playing it

Push it where you want it.

Free

Spark

A whole new idea in one tap, still inside your genre. Keep tapping until one grabs you.

Free

Dilate

One finger bends the whole line: drag it, push it, brighten it. Hit REC and the move is kept.

Free

Key & chords

Every note stays in key. Pick a progression and the first note of each bar lands on its chord. STRICT keeps it inside the scale completely.

Free

The kick

Bass is half of a pair. Each part is written around the kick: Hip Hop sits under it, Metal locks to it, Pocket sits between the kicks.

34 voices

Upright to Reese to 808.

Played basses, sub and 808s, synths, heavy growls and character voices. Every one is synthesised by 30P — tap SHAPE IT to set the envelope and EQ.

The BRACE voice picker: 34 voices in five groups — Played, Sub and 808, Synth, Heavy and Character.

Write your own

Every note, your way.

When you want to go further than BRACE's idea, open it up.

The CREATE screen: IDEAS, CHORDS, STOP and CLEAR beside a grid whose rows are only the notes of the key.
Unlock
CREATE — tap in notes on a grid that only has the notes of your key, so nothing can land wrong. IDEAS and CHORDS give you a start.
The EDIT screen: the pattern as it plays, with lanes for notes, velocity, accent, glide and DILATE.
Unlock
EDIT — the pattern as it plays. Move notes, then set velocity, accent, glide and DILATE, note by note.

Take it anywhere

Into your track.

Pick 1, 4, 8 or 16 bars. Save the audio as a WAV to the Files app, share it to GarageBand, AUM, AirDrop or Messages, or copy it to the clipboard.

With the unlock, BRACE does MIDI: export and copy the part as a MIDI file, play it from a USB or Bluetooth keyboard, and send it out to your own synths with its drums on channel 10.

Free, and the unlock

A real instrument for free.

The free version isn't a demo. It has no time limit, needs no account, and nothing in it expires.

Free, always

Play

  • All ten genres, all four parts of each
  • All 34 voices
  • Key, tempo and chords
  • Dilate, Spark and Run
  • Export your audio as a WAV, 1 to 16 bars
One-time unlock

Keep & write

  • Save your presets, ideas and projects
  • All MIDI: files to export and copy, keyboards in, your synths and drums out
  • CREATE and EDIT — the line, note by note

One payment, not a subscription. The price is shown in your own currency by the App Store. Anything you made before unlocking stays exactly where it is.

iPhone + iPad

Unlock once. It's on both.

One app for iPhone and iPad. Buy the unlock once, then restore it free on your other devices signed in to the same Apple ID. RESTORE PURCHASE sits right next to the buy button.

Made from nothing

Every sound is ours.

BRACE's built-in sounds aren't recordings. Every voice is synthesised by 30P from scratch, and it all runs on your device.

  • No sample libraries
  • No AI audio
  • No cloud
  • No microphone

Coming to the App Store

Be first to play it.

Leave your email and you'll get one message: the day BRACE is on the App Store. Nothing else.

On a Mac? BRACE as an AU / VST3 plug-in and standalone app follows the iPhone and iPad release.

Sampling In Reverse album cover

The album · 30P

Sampling In Reverse.

My album. AI-assisted and human-directed: my music, run through Suno, then edited, iterated and refined until it became the record I wanted to hear.

$9.99